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October 24, 2014

Homework Help: science

Posted by HERSHEYS on Thursday, April 19, 2007 at 4:54pm.

How do scientists know how to make a flu vaccine if viruses can be different every year?

he flu virus changes every year. However, scientists gather information about virus mutations, or changes, before the flu-virus season begins. This lets them predict what each year’s flu virus might look like. Based on that, a vaccine is made that we hope will be accurate enough to help people fight off major cases of the flu.

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